Why is your network setup so odd?
It sounds like you are frustrated but it seems people here are trying to help and you are dead set on getting defensive.
It amazes me after following this forum for years how people want to blame everyone but themselves. Sure we are customers but if we trust our dealers we need to let them do their job.
I handed over the keys to my network years ago and my dealer has done great, I know what I'm doing as I'm in the tech sector but I have better things to do. It's not worth wasting my money debating with my dealer.
I have run the LG on 8 TVs for a year and zero issues. Works awesome.
Sounds like you are in a bad situation and just want to have things work, but cut everyone some slack and get back to a basic network setup. My wife made me take my hands off the wheel, as I travel too much and instead of micromanaging the system any issues her or I call the dealer and done. Everyone is much happier.